CBWFQ

Greetings all,

when using " bandwidth percent %" is it a percent of the interface configured bandwidth or a percent of .75* int bw?

also " bandwidth remaining percent %" is it a remaining percent of the .75* interface bandwidth?

appreciate if can be clarified by an example.

regards

Jorf

Comments


  • there is a not much difference between these commands but there usage is quite different and yes they are going to reserve the traffic from the available traffic which is 75% of the link bandwidth (by default)

    " bandwidth percent % "
    lets say we have a question like this :

     Reserve 35% of the link of interface bandwidth for voice
     traffic?
     
     Solution:
     in this question the only information is given is the % of
     the bandwidth so the best and easy way will be using the
     bandwidth percent command..os form thr available 75% of the
     traffic 35% will be reserved for voice and the remaing bw
     will be available for all the other traffic.

     " bandwidth remaining percent %"
     
     we have a 100 mbps link and following values are given for bw reservation:

     - reserve 10 mbps for http
     - reserve 15 mbps for telnet
     - reserve 15% of the remaining traffic for ftp

     now in this case the reservation for the http, telnet is quite easy, just create a class map match the traffic that is required in it and in the policy map call these classes and just issue the
    "bandwith 10 mbps" command but for the ftp traffic we can accoplish this in 2 ways either we can calculate the traffic rate by subtracting the reserved bandwith from the availble traffic and then taking a 15% of the remaning traffic or we can simply use the bandwith remainig percent commad.

    so when we will issue this command it will do the same thing but it's automatic and prune to calculation error..

    Peace

  • "bandwidth percent" uses a percentage of total reservable bandwidth (configured BW in other words)

    "bandwidth remaining percent" uses percentage of available bandwidth (BW left after reservations).

     

    A very good example can be found here

    http://ardenpackeer.com/qos-voip/tutorial-what-is-the-difference-between-bandwidth-percent-and-bandwidth-remaining-percent/

     

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